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PM2.5 particles are small enough to penetrate deep into the lungs when inhaled, making them arguably the most dangerous type of pollution

Understanding Chronic Bronchitis When this inflammation and mucus production persist for most days over three months for at least two consecutive years, it is diagnosed as chronic bronchitis, a major component of chronic obstructive pulmonary disease (COPD)

Various studies have examined the effectiveness of this counter-industry approach on adolescents and teens, the ads primary targets audience

Historique [modifier | modifier le code] Les dangers du tabac sont observs ds le dbut du XVII e sicle, et sa cancrognicit est souponne au XVIII e sicle, avant d'tre largement admise au milieu du XIX e sicle [7]